EARLY DEVOXIC HISTORY OF XEW YORK AND EASTERN NORTH AMERICA 215 



late and become separated by narrower intervals toward the anterior margin. 

 Length 17 mm, greatest diameter 13 mm. 



This shell is like L. perlata Hall and L. spatiosa Hall of the 

 Helderbergian as the outline of those species has been represented but in 

 this respect conjoined with the peculiar character of its surface markings, I 

 am unfamiliar with any other species like it. 



Locality. At the base of the formation, Dolbel brook, the Forillon. 



BRYOZOA 



Fenestella cf. lata Hall 



Fen est el la (Unitrypa) lata Hall & Simpson. Palaeontology of New York. 

 1887. 6: 136, pi. 52, fig. i-io 



Specimens showing both faces of the frond agree excellently with the 

 representations of this species and these specimens were thus identified by 

 the late G. B. Simpson. P^ en est el la lata is described from the Onon- 

 daga limestone of Walpole, Ontario, and the Gaspe specimens are from 

 Grande Greve. Other fenestelloids are present in the fauna but they do 

 not lend themselves to identification. 



Stictopora sp. 



A delicate form of this genus with cells in 7-9 vertical rows separated 

 by elevated lines is of quite common occurrence in the Grande Greve 

 limestone. 



Monticulipora 



There are both encrusting and branching forms of this genus which 

 may represent distinct species. These occur in the upper beds at Grande 

 Greve. 



CORALS 



Mr Billings described several species of cyathophylloids from the 

 Gaspe localities on the Forillon and at Perce and such fossils, together with 

 F"avosites are not infrequent in the limestones of Grande Greve. The 

 material is not often well preserved but the occasional silicification will help 

 the future student of these bodies to more exact determinations than we 

 care to enter upon. At Perce no cyathophylloids were found in the Perce 

 Rock beds but we have observed the species noted by Billings, in the partly 

 submerged reef just north of the north face of Mt Joli at an horizon just 

 below or perhaps constituting the lower part of the Perce beds. 



Several of the coral species have been carefully restudied by Mr Lambe, 

 assistant paleontologist of the Canadian survey, and of his determinations 

 we have here availed ourselves. 



